Name: Extension Builder
Brand: HaMuch
SKU: extension-renovation
Rating: 4.61 (9 reviews)

Find affordable SE25 extension builders now

Extension builders rates in SE25 range from £17/hour £196/day (Oaksure Construction ) to £80/hour £400/day (Banga Decoration). To see prices and availability now for your job click green button.

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"Build a dormer loft conversion" - BR3, job posted 19/09/26

"Kitchen extension" - BECKENHAM, job posted 25/08/25

"Build an outbuilding" - SOUTH NORWOOD, job posted 02/03/25

"Loft conversion" - CROYDON, job posted 16/02/25

"Loft conversion" - BR3, job posted 19/11/24

"Loft conversion, 1 bedroom with en suite bathroom, remove chimney breast in the attic, and remove chimney breast in the bedroom." - CROYDON, job posted 29/09/24

"Loft conversion to be done" - CROYDON, job posted 25/02/24

"Basement conversion" - BECKENHAM, job posted 19/02/24

"Loft conversion" - CROYDON, job posted 06/01/24

Quickly find an Extension Builder in SE25

Use these steps to find Extension Builders in SE25 for FREE!

Post your job: Click "Get quotes" and briefly describe your job.
Enter your details: We’ll match you with Extension Builders in SE25. We’ll notify you via text or email when an Extension Builder is available to quote.
Select your Extension Builder: Compare Extension Builders interested in working with you. You can use HaMuch to safely message local SE25 Extension Builders or phone them directly - you’re in control!

Local Extension Builders in London Boroughs

Local Extension Builders in London Boroughs
Borough in London
Extension Builders in South Norwood
Extension Builders in Thornton Heath
Extension Builders in Penge
Extension Builders in Crystal Palace
Extension Builders in Croydon
Extension Builders in Croydon
Extension Builders in Beckenham
Extension Builders in Sydenham
Extension Builders in Tulse Hill
Extension Builders in Streatham

Job estimates from extension builders near you

Whether you’re looking to extend your kitchen with a side return extension or you want to convert your basement into a liveable space, read our cost guides to get an idea of how much each project costs before getting a more accurate quote from our database of reliable tradespeople.

Build a timber frame extension - £26,144

Garden office - £10,144

Granny annexe - £87,144

Build a flat roof extension - £22,144

Convert a Garage - £16,144

Hip to gable loft conversion - £42,144

Convert a bungalow loft - £29,144

Build a dormer loft conversion - £42,144

Build a swimming pool - £81,144

Build a Mansard loft conversion - £52,144

Concrete foundations - £6,394

Underpin a building - £17,644

Two storey extension - £88,216

Convert a basement - £39,120

Side return extension - £43,120

Loft conversion - £35,100

Garage - £18,644

Single storey extension - £57,880

Outbuilding - £10,144

Install an RSJ - £2,344

Build a kitchen extension - £42,144

More extensions & conversions cost guides...

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